Wagon-jack



G.B. OLARK.

WAGON JACK.

(No Model.)

"P a tented May 13, 1884.

WITNESSES.

Erica.

a'rsnr GEORGE B. CLARK, OF BOZRAHVILLE, CONNECTICUT.

WAGON-JACK.

BPECIPICATION forming part of Letters Patent No. 298,350, dated May 13, 1884.

Application filed March 24, 1884. (No model.)

To all whom it may concern Be it known that I, GEORGE E. CLARK, of Bozrahville, New London county, Connecticut, have invented certain new and useful Im- V provements in WVagon-Jacks, which improvements are fully set forth and described in the following specification, reference being had to the accompanying drawings.

My improvements relate to a new device for lifting carriage-axles,forconvenience in greasing said axles or in washing and repairing the wheels, my immediate object being to produce a jack which shall be of great strength and power, cheaply constructed, and which, when not in use, may be folded into a very small package for convenience and economy in shipping.

In the accompanying drawings, Figure 1 is a side elevation of my device ready for use. Fig. 2 is a similar view showing the parts as they appear when the jack is elevated to its greatest height. Fig. 3 shows the same partly folded. Fig. 4 shows said jack folded into the smallest possible compass, as it would appear when ready. forshipment. Fig. 5 is a detached view, somewhat enlarged, of the lever-arm k. Fig. 6 is a view of the metallic piece 6, which is formed with a series of steps, one of which engages the axle to be raised. Fig. 7 is a view of said piece 0, showing a different means for securing it to the jack-frame.

My device is of general triangular form, and is constructed, preferably, of strips of hard wood of sufficient size and strength to sustain the load to be lifted, the several parts being secured pivotally to each other by bolts or rivets. The base a is a single strip, one of whose ends is clamped between strips b b, a rivet, c, passing through the three pieces a b b, and forming ajointed connection. The other end of the base a is jointed in a similar manner to pieces d d by rivet c.

On the outer side of d d is secured a piece, 6, made preferably of cast metal, and having a series of steps to engage axles of different heights. This metallic piece eservesa double purpose-providing a series of steps, as above stated, and also stiffening the strips (1 d, on which rests the greater part of the weight lifted. Piece 6 may be secured to dd by screws, as at h, in which case a strip of wood would first be inserted between (1 d, and nailed through and through, to receive the screws; or, if preferred, a rib, n, as in Fig. 7, could be cast on the back side of piece 6 of sufficient thickness to fill the space between (2 d, in case piece 6 would be secured in place by bolts or rivets passing through d d and the rib on piecee. At the upper end of strips d d, above piece e, is a bolt or rivet, i. Pivoted in the upper end of strips b b is my liftinglever k, the pivot c forming the fulcrum of said lever.

In order to detach the short arm of lever it from the pivotz' without being compelled to remove said pivot, I have slotted the upper side of said short arm, forming a hook, as

at m.

To provide a means for holding the jack in an elevated position, I have made the several parts of such size and shape that the joint'at 0" passes below or within a line'drawn from c to 1, (when the jack is raised.) the constant tendency then being to hold the long arm of lever 7c down against base a.

In folding my device for shipment the hook end of k is removed from pivot i, and d d are dropped down upon base a, the lever and pieces b b being dropped and extended, as in Fig. 3. k is now folded upon b b, and the three parts b, b, and k are then swung around to the under side of base a, opposite (I (1.

Having thus described myinvention,I claim as new and wish to secure by Letters Patent- In a wagon-jack, the combination,with base a, of strips d d, jointed to one end of said base, and having pivot i and metallic steps, as described, and strips b b, jointed to the other end of base at, having pivoted in their upper'or free end a lever, whose short end is provided with a hook to engage pivot i, the several parts named being of such size and so connected that when said jack is elevated the fulcrum of lever it passes below a line drawn through c i, as and for the purpose specified.

enonen B. CLARK.

Witnesses:

FRANK H. ALLEN, ARTHUR N. LADD. 

